Mobile device and optical imaging lens thereof

ABSTRACT

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

INCORPORATION BY REFERENCE

This application claims priority from P.R.C. Patent Application No.201310472840.3, filed on Oct. 11, 2013, the contents of which are herebyincorporated by reference in their entirety for all purposes.

TECHNICAL FIELD

The present invention relates to a mobile device and an optical imaginglens thereof, and particularly, relates to a mobile device applying anoptical imaging lens having five lens elements and an optical imaginglens thereof.

BACKGROUND

The ever-increasing demand for smaller sized mobile devices, such ascell phones, digital cameras, etc. correspondingly triggered a growingneed for a smaller sized photography module, comprising elements such asan optical imaging lens, a module housing unit, and an image sensor,etc., contained therein. Size reductions may be contributed from variousaspects of the mobile devices, which includes not only the chargecoupled device (CCD) and the complementary metal-oxide semiconductor(CMOS), but also the optical imaging lens mounted therein. When reducingthe size of the optical imaging lens, however, achieving good opticalcharacteristics becomes a challenging problem.

U.S. Patent Publication No. 20110316969, 20100254029, 20130107376 and20130057967, U.S. Pat. Nos. 8,345,323 and 7,911,712 and Japan PatentPublication No. 2008-281760 all disclosed an optical imaging lensconstructed with an optical imaging lens having five lens elements. Thelength of the optical imaging lens, which, from the object-side surfaceof the first lens element to the image plane, is greater than 10 mm, inU.S. Patent Publication No. 20110316969, the length of the opticalimaging lens even exceeds 14 mm, and they are too long for smaller sizedmobile devices. Therefore, there is needed to develop optical imaginglens which is capable to place with five lens elements therein, with ashorter length, while also having good optical characters.

SUMMARY

An object of the present invention is to provide a mobile device and anoptical imaging lens thereof. With controlling the convex or concaveshape of the surfaces and/or the refracting power of the lens elements,the length of the optical imaging lens is shortened and meanwhile thegood optical characters, and system functionality are sustained.

In an exemplary embodiment, an optical imaging lens comprises,sequentially from an object side to an image side along an optical axis,comprises first, second, third, fourth and fifth lens elements, each ofthe first, second, third, fourth and fifth lens elements havingrefracting power, an object-side surface facing toward the object sideand an image-side surface facing toward the image side, wherein: thesecond lens element has positive refracting power, and the image-sidesurface thereof comprises a convex portion in a vicinity of a peripheryof the second lens element; the image-side surface of the third lenselement comprises a convex portion in a vicinity of the optical axis;the object-side surface of the fourth lens element comprises a concaveportion in a vicinity of a periphery of the fourth lens element, and theimage-side surface of the fourth lens element is a convex surface; andthe fifth lens element is constructed by plastic material, and theoptical imaging lens as a whole comprises only the five lens elementshaving refracting power.

In another exemplary embodiment, other equation(s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example, a central thickness of the third lenselement along the optical axis, T3, and an air gap between the firstlens element and the second lens element along the optical axis, G12,could be controlled to satisfy the equation as follows:

T3/G12≦3.5   Equation (1); or

A central thickness of the second lens element along the optical axis,T2, and an effective focal length of the optical imaging lens, EFL,could be controlled to satisfy the equation as follows:

EFL/T2≦7.5   Equation (2); or

G12 and EFL could be controlled to satisfy the equation as follows:

EFL/G12≦16.5   Equation (3); or

EFL/G12≦13   Equation (3′); or

EFL and a central thickness of the fourth lens element along the opticalaxis, T4, could be controlled to satisfy the equation as follows:

EFL/T4≦7   Equation (4); or

G12 and a back focal length of the optical imaging lens, i.e. thedistance from the image-side surface of the fifth lens element to animage plane on the optical axis, BFL, could be controlled to satisfy theequation as follows:

BFL/G12≦7   Equation (5); or

BFL/G12≦5.5   Equation (5′); or

BFL and a central thickness of the first lens element along the opticalaxis, T1, could be controlled to satisfy the equation as follows:

BFL/T1≦3.7   Equation (6); or

T1 and EFL could be controlled to satisfy the equation as follows:

EFL/T1≦7.5   Equation (7); or

T4 and BFL could be controlled to satisfy the equation as follows:

BFL/T4≦3.2   Equation (8); or

The abbe number of the second lens element, V2, and the abbe number ofthe third lens element, V3, could be controlled to satisfy the equationas follows:

15≦|V2-V3|≦40   Equation (9); or

T4 and an air gap between the second lens element and the third lenselement along the optical axis, G23, could be controlled to satisfy theequation as follows:

1.7≦T4/G23   Equation (10).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

In some exemplary embodiments, more details about the convex or concavesurface structure could be incorporated for one specific lens element orbroadly for plural lens elements to enhance the control for the systemperformance and/or resolution. For example, the fourth lens element mayhave positive refracting power, the object-side surface of the fourthlens element may comprise a convex portion in a vicinity of the opticalaxis, the object-side surface of the fifth lens element may comprise aconcave portion in a vicinity of a periphery of the fifth lens element,and/or the image-side surface of the fifth lens element may comprise aconvex portion in a vicinity of a periphery of the fifth lens element,etc. It is noted that the details listed here could be incorporated inexample embodiments if no inconsistency occurs.

In another exemplary embodiment, a mobile device comprising a housingand a photography module positioned in the housing is provided. Thephotography module comprises any of aforesaid example embodiments ofoptical imaging lens, a lens barrel, a module housing unit and an imagesensor. The lens barrel is for positioning the optical imaging lens, themodule housing unit is for positioning the lens barrel, and the imagesensor is positioned at the image side of the optical imaging lens.

Through controlling the convex or concave shape of the surfaces and/orthe refraction power of the lens element(s), the mobile device and theoptical imaging lens thereof in exemplary embodiments achieve goodoptical characters and effectively shorten the length of the opticalimaging lens.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 is a cross-sectional view of one single lens element according tothe present disclosure;

FIG. 2 is a cross-sectional view of a first embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 3 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a first embodiment of the optical imaging lensaccording to the present disclosure;

FIG. 4 is a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 5 is a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 6 is a cross-sectional view of a second embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 7 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a second embodiment of the optical imaginglens according to the present disclosure;

FIG. 8 is a table of optical data for each lens element of the opticalimaging lens of a second embodiment of the present disclosure;

FIG. 9 is a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 is a cross-sectional view of a third embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 11 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a third embodiment of the optical imaging lensaccording the present disclosure;

FIG. 12 is a table of optical data for each lens element of the opticalimaging lens of a third embodiment of the present disclosure;

FIG. 13 is a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 is a cross-sectional view of a fourth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 15 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fourth embodiment of the optical imaginglens according the present disclosure;

FIG. 16 is a table of optical data for each lens element of the opticalimaging lens of a fourth embodiment of the present disclosure;

FIG. 17 is a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 is a cross-sectional view of a fifth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 19 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fifth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 20 is a table of optical data for each lens element of the opticalimaging lens of a fifth embodiment of the present disclosure;

FIG. 21 is a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 is a cross-sectional view of a sixth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 23 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a sixth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 24 is a table of optical data for each lens element of the opticalimaging lens of a sixth embodiment of the present disclosure;

FIG. 25 is a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 is a cross-sectional view of a seventh embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 27 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a seventh embodiment of the optical imaginglens according the present disclosure;

FIG. 28 is a table of optical data for each lens element of the opticalimaging lens of a seventh embodiment of the present disclosure;

FIG. 29 is a table of aspherical data of a seventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 is a cross-sectional view of an eighth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 31 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of an eighth embodiment of the optical imaginglens according the present disclosure;

FIG. 32 is a table of optical data for each lens element of the opticalimaging lens of an eighth embodiment of the present disclosure;

FIG. 33 is a table of aspherical data of an eighth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 34 is a cross-sectional view of a ninth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 35 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a ninth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 36 is a table of optical data for each lens element of the opticalimaging lens of a ninth embodiment of the present disclosure;

FIG. 37 is a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 38 is a cross-sectional view of a tenth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 39 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a tenth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 40 is a table of optical data for each lens element of the opticalimaging lens of a tenth embodiment of the present disclosure;

FIG. 41 is a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 is a cross-sectional view of an eleventh embodiment of anoptical imaging lens having five lens elements according to the presentdisclosure;

FIG. 43 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of an eleventh embodiment of the optical imaginglens according the present disclosure;

FIG. 44 is a table of optical data for each lens element of the opticalimaging lens of an eleventh embodiment of the present disclosure;

FIG. 45 is a table of aspherical data of an eleventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 46 is a table for the values of T1, T2, T3, T4, G12, G23, V2, V3,EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1, EFL/T1,BFL/T4, |V2-V3| and T4/G23 of all eleven example embodiments;

FIG. 47 is a structure of an example embodiment of a mobile device;

FIG. 48 is a partially enlarged view of the structure of another exampleembodiment of a mobile device.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons having ordinary skill in the artwill understand other varieties for implementing example embodiments,including those described herein. The drawings are not limited tospecific scale and similar reference numbers are used for representingsimilar elements. As used in the disclosures and the appended claims,the terms “example embodiment,” “exemplary embodiment,” and “presentembodiment” do not necessarily refer to a single embodiment, although itmay, and various example embodiments may be readily combined andinterchanged, without departing from the scope or spirit of the presentinvention. Furthermore, the terminology as used herein is for thepurpose of describing example embodiments only and is not intended to bea limitation of the invention. In this respect, as used herein, the term“in” may include “in” and “on”, and the terms “a”, “an” and “the” mayinclude singular and plural references. Furthermore, as used herein, theterm “by” may also mean “from”, depending on the context. Furthermore,as used herein, the term “if” may also mean “when” or “upon”, dependingon the context. Furthermore, as used herein, the words “and/or” mayrefer to and encompass any and all possible combinations of one or moreof the associated listed items.

Here in the present specification, “a lens element having positiverefracting power (or negative refracting power)” means that the lenselement has positive refracting power (or negative refracting power) inthe vicinity of the optical axis. “An object-side (or image-side)surface of a lens element comprises a convex (or concave) portion in aspecific region” means that the object-side (or image-side) surface ofthe lens element “protrudes outwardly (or depresses inwardly)” along thedirection parallel to the optical axis at the specific region, comparedwith the outer region radially adjacent to the specific region. TakingFIG. 1 for example, the lens element shown therein is radially symmetricaround the optical axis which is labeled by I. The object-side surfaceof the lens element comprises a convex portion at region A, a concaveportion at region B, and another convex portion at region C. This isbecause compared with the outer region radially adjacent to the region A(i.e. region B), the object-side surface protrudes outwardly at theregion A, compared with the region C, the object-side surface depressesinwardly at the region B, and compared with the region E, theobject-side surface protrudes outwardly at the region C. Here, “in avicinity of a periphery of a lens element” means that in a vicinity ofthe peripheral region of a surface for passing imaging light on the lenselement, i.e. the region C as shown in FIG. 1. The imaging lightcomprises chief ray Lc and marginal ray Lm. “In a vicinity of theoptical axis” means that in a vicinity of the optical axis of a surfacefor passing the imaging light on the lens element, i.e. the region A asshown in FIG. 1. Further, a lens element could comprise an extendingportion E for mounting the lens element in an optical imaging lens.Ideally, the imaging light would not pass the extending portion E. Herethe extending portion E is only for example, the structure and shapethereof are not limited to this specific example. Please also noted thatthe extending portion of all the lens elements in the exampleembodiments shown below are skipped for maintaining the drawings cleanand concise.

In the present invention, examples of an optical imaging lens which is aprime lens are provided. Example embodiments of an optical imaging lensmay comprise a first lens element, a second lens element, a third lenselement, a fourth lens element and a fifth lens element, each of thelens elements comprises refracting power, an object-side surface facingtoward an object side and an image-side surface facing toward an imageside. These lens elements may be arranged sequentially from the objectside to the image side along an optical axis, and example embodiments ofthe lens as a whole may comprise only the five lens elements havingrefracting power. In an example embodiment: the second lens element haspositive refracting power, and the image-side surface thereof comprisesa convex portion in a vicinity of a periphery of the second lenselement; the image-side surface of the third lens element comprises aconvex portion in a vicinity of the optical axis; the object-sidesurface of the fourth lens element comprises a concave portion in avicinity of a periphery of the fourth lens element, and the image-sidesurface of the fourth lens element is a convex surface; and the fifthlens element is constructed by plastic material.

Preferably, the lens elements are designed in light of the opticalcharacteristics and the length of the optical imaging lens. For example,the second lens element having positive refracting power provides thepositive refracting power required in the optical imaging lens forassisting in collecting light, and combining this with the convexportion in a vicinity of a periphery of the second lens element formedon the image-side surface thereof, the convex portion in a vicinity ofthe optical axis formed on the image-side surface of the third lenselement, the concave portion in a vicinity of a periphery of the fourthlens element on the object-side surface thereof, the convex image-sidesurface of the fourth lens element, the aberration of the opticalimaging lens could be adjusted. Further with the details of shape on thesurfaces and the refracting power of the lens elements listed here, suchas the positive refracting power of the fourth lens element, the concaveportion in a vicinity of a periphery of the fifth lens element formed onthe object-side surface thereof and/or the convex portion in a vicinityof a periphery of the fifth lens element formed on the image-sidesurface thereof, aberration of the optical imaging lens could be furtheradjusted. Therefore, through the details listed above, the image qualityof the optical imaging lens could be promoted.

In another exemplary embodiment, some equation(s) of parameters, such asthose relating to the ratio among parameters could be taken intoconsideration. For example, a central thickness of the third lenselement along the optical axis, T3, and an air gap between the firstlens element and the second lens element along the optical axis, G12,could be controlled to satisfy the equation as follows:

T3/G12≦3.5   Equation (1); or

A central thickness of the second lens element along the optical axis,T2, and an effective focal length of the optical imaging lens, EFL,could be controlled to satisfy the equation as follows:

EFL/T2≦7.5   Equation (2); or

G12 and EFL could be controlled to satisfy the equation as follows:

EFL/G12≦16.5   Equation (3); or

EFL/G12≦13   Equation (3′); or

EFL and a central thickness of the fourth lens element along the opticalaxis, T4, could be controlled to satisfy the equation as follows:

EFL/T4≦7   Equation (4); or

G12 and a back focal length of the optical imaging lens, i.e. thedistance from the image-side surface of the fifth lens element to animage plane on the optical axis, BFL, could be controlled to satisfy theequation as follows:

BFL/G12≦7   Equation (5); or

BFL/G12≦5.5   Equation (5′); or

BFL and a central thickness of the first lens element along the opticalaxis, T1, could be controlled to satisfy the equation as follows:

BFL/T1≦3.7   Equation (6); or

T1 and EFL could be controlled to satisfy the equation as follows:

EFL/T1≦7.5   Equation (7); or

T4 and BFL could be controlled to satisfy the equation as follows:

BFL/T4≦3.2   Equation (8); or

The abbe number of the second lens element, V2, and the abbe number ofthe third lens element, V3, could be controlled to satisfy the equationas follows:

15≦|V2-V3|≦40   Equation (9); or

T4 and an air gap between the second lens element and the third lenselement along the optical axis, G23, could be controlled to satisfy theequation as follows:

1.7≦T4/G23   Equation (10).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

Reference is now made to Equation (1). Considering shortening of T3 hasmore potential than shortening of G12, which is required for a certaindistance between the first and second lens element, for the smalleffective diameter for passing imaging light in the third lens element,here the value of T3/G12 is suggested for an upper limit, such as 3.5 tosatisfying Equation (1), and preferably, it is suggested to be within0.3˜3.5.

Reference is now made to Equation (2). Considering the value of EFL isdecreased along with the shortening of the length of the optical imaginglens and shortening of T2 is limited by the positive refracting power inthe second lens element, here the value of EFL/T2 is suggested for anupper limit, such as 7.5 to satisfying Equation (2), and preferably, itis suggested to be within 3.0˜7.5.

Reference is now made to Equation (3). Considering that the shorteningof EFL may assist in enlarging the HFOV and the value of G12 is requiredfor a certain distance between the first and second lens element, hereEFL/G12 is suggested for an upper limit, such as 16.5 to satisfyingEquation (3) or 13.0 to satisfying Equation (3′), and preferably, it issuggested to be limited by a lower limit, such as within 6.0˜16.5. WhenEFL/G12 is lower than or equal to 13.0, the greater G12 may facilitatethe assembly process.

Reference is now made to Equations (4). As mentioned before, theshortening of EFL may assist in enlarging the HFOV, but the fourth lenselement having a great effective diameter for passing imaging light isrequired for a thick thickness to facilitate the manufacture process.Therefore, the value of EFL/T4 is suggested for an upper limit, such as7.0 to satisfy Equation (4), and preferably, it is suggested to bewithin 1.8˜7.0.

Reference is now made to Equation (5). Considering the shortening of BFLhas more potential than the shortening of G12, which is required for acertain distance between the first and second lens element, for theshort EFL, here the value of BFL/G12 is suggested for an upper limit,such as 7.0 to satisfying Equation (5) or 5.5 to satisfying Equation(5′), and preferably, it is suggested to be limited by a lower limit,such as within 1.8˜7.0. When BFL/G12 is lower than or equal to 5.5, thegreater G12 may facilitate the assembly process.

Reference is now made to Equation (6). As mentioned before, theshortening of BFL has more potential than the shortening of T1 for theshort EFL. Here, the value of BFL/T1 is suggested to be smaller than orequal to 3.7 to satisfy Equation (6), and preferably, it is suggested tobe within 1.5˜3.7.

Reference is now made to Equation (7). As mentioned above, although bothEFL and T1 will be shortened along with the shortening of the length ofthe optical imaging lens, the shortening of EFL may assist in enlargingthe HFOV. Therefore, here the value of EFL/T1 is suggested to be smallerthan or equal to 7.5 to satisfy Equation (7), and preferably, it issuggested to be within 4.3˜7.5.

Reference is now made to Equation (8). As mentioned before, theshortening of BFL has more potential than the shortening of T4, which isrequired for a thick thickness to facilitate the manufacture process andthe formation of the convex image-side surface of the fourth lenselement, for the short EFL. Therefore, here the value of BFL/T4 issuggested for an upper limit, such as 3.2 to satisfying Equation (8),and preferably, it is suggested to be limited by a lower limit, such aswithin 0.5˜3.2.

Reference is now made to Equation (9). Considering that the chromaticaberration may be severe when the length of the optical imaging lens isshortened, here the Equation (9) is designed for eliminating thechromatic aberration by adjusting the abbe number of the second andthird lens element.

Reference is now made to Equation (10). Considering that the shorteningof the air gap between the second and third lens elements has morepotential than the shortening of T4, which is limited by the conveximage-side surface and the great effective diameter for passing imaginglight of the fourth lens element, for the less possibility of theinterference occurred by the convex portion in a vicinity of a peripheryof the second lens element formed on the image-side surface thereof, thevalue of T4/G23 is suggested for a lower limit, such as 1.7 tosatisfying Equation (10), and preferably, it is suggested to be within1.7˜5.3.

When implementing example embodiments, more details about the convex orconcave surface structure may be incorporated for one specific lenselement or broadly for plural lens elements to enhance the control forthe system performance and/or resolution, as illustrated in thefollowing embodiments. For example, the fourth lens element may havepositive refracting power, the object-side surface of the fourth lenselement may comprise a convex portion in a vicinity of the optical axis,the object-side surface of the fifth lens element may comprise a concaveportion in a vicinity of a periphery of the fifth lens element, and/orthe image-side surface of the fifth lens element may comprise a convexportion in a vicinity of a periphery of the fifth lens element, etc. Itis noted that the details listed here could be incorporated in exampleembodiments if no inconsistency occurs.

Several exemplary embodiments and associated optical data will now beprovided for illustrating example embodiments of optical imaging lenswith good optical characters and a shortened length. Reference is nowmade to FIGS. 2-5. FIG. 2 illustrates an example cross-sectional view ofan optical imaging lens 1 having five lens elements of the opticalimaging lens according to a first example embodiment. FIG. 3 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 1 according to anexample embodiment. FIG. 4 illustrates an example table of optical dataof each lens element of the optical imaging lens 1 according to anexample embodiment. FIG. 5 depicts an example table of aspherical dataof the optical imaging lens 1 according to an example embodiment.

As shown in FIG. 2, the optical imaging lens 1 of the present embodimentcomprises, in order from an object side A1 to an image side A2 along anoptical axis, a first lens element 110, an aperture stop 100, a secondlens element 120, a third lens element 130, a fourth lens element 140and a fifth lens element 150. A filtering unit 160 and an image plane170 of an image sensor are positioned at the image side A2 of theoptical lens 1. Each of the first, second, third, fourth, fifth lenselements 110, 120, 130, 140, 150 and the filtering unit 160 comprises anobject-side surface 111/121/131/141/151/161 facing toward the objectside A1 and an image-side surface 112/122/132/142/152/162 facing towardthe image side A2. The example embodiment of the filtering unit 160illustrated is an IR cut filter (infrared cut filter) positioned betweenthe fifth lens element 150 and an image plane 170. The filtering unit160 selectively absorbs light with specific wavelength from the lightpassing optical imaging lens 1. For example, IR light is absorbed, andthis will prohibit the IR light which is not seen by human eyes fromproducing an image on the image plane 170.

Please noted that during the normal operation of the optical imaginglens 1, the distance between any two adjacent lens elements of thefirst, second, third, fourth and fifth lens elements 110, 120, 130, 140,150 is a unchanged value, i.e. the optical imaging lens 1 is a primelens.

Exemplary embodiments of each lens element of the optical imaging lens 1which may be constructed by plastic material will now be described withreference to the drawings.

An example embodiment of the first lens element 110 has positiverefracting power. The object-side surface 111 is a convex surfacecomprising a convex portion 1111 in a vicinity of the optical axis and aconvex portion 1112 in a vicinity of a periphery of the first lenselement 110, and the image-side surface 112 is a concave surfacecomprising a concave portion 1121 in a vicinity of the optical axis anda concave portion 1122 in a vicinity of the periphery of the first lenselement 110.

An example embodiment of the second lens element 120 has positiverefracting power. The object-side surface 121 is a concave surfacecomprising a concave portion 1211 in a vicinity of the optical axis anda concave portion 1212 in a vicinity of a periphery of the second lenselement 120, and the image-side surface 122 is a convex surfacecomprising a convex portion 1221 in a vicinity of the optical axis and aconvex portion 1222 in a vicinity of the periphery of the second lenselement 120.

An example embodiment of the third lens element 130 has negativerefracting power. The object-side surface 131 is a concave surfacecomprising a concave portion 1311 in a vicinity of the optical axis anda concave portion 1312 in a vicinity of a periphery of the third lenselement 130, and the image-side surface 132 is a convex surfacecomprising a convex portion 1321 in a vicinity of the optical axis and aconvex portion 1322 in a vicinity of a periphery of the third lenselement 130.

An example embodiment of the fourth lens element 140 has positiverefracting power. The object-side surface 141 comprises a convex portion1411 in a vicinity of the optical axis and a concave portion 1412 in avicinity of a periphery of the fourth lens element 140. The image-sidesurface 142 is a convex surface comprising a convex portion 1421 in avicinity of the optical axis and a convex portion 1422 in a vicinity ofthe periphery of the fourth lens element 140.

An example embodiment of the fifth lens element 150 has negativerefracting power. The object-side surface 151 comprises a convex portion1511 in a vicinity of the optical axis and a concave portion 1512 in avicinity of a periphery of the fifth lens element 150. The image-sidesurface 152 comprises a concave portion 1521 in a vicinity of theoptical axis and a convex portion 1522 in a vicinity of a periphery ofthe fifth lens element 150.

In example embodiments, air gaps exist between the lens elements 110,120, 130, 140, 150, the filtering unit 160 and the image plane 170 ofthe image sensor. For example, FIG. 1 illustrates the air gap d1existing between the first lens element 110 and the second lens element120, the air gap d2 existing between the second lens element 120 and thethird lens element 130, the air gap d3 existing between the third lenselement 130 and the fourth lens element 140, the air gap d4 existingbetween the fourth lens element 140 and the fifth lens element 150, theair gap d5 existing between the fifth lens element 150 and the filteringunit 160 and the air gap d6 existing between the filtering unit 160 andthe image plane 170 of the image sensor. However, in other embodiments,any of the aforesaid air gaps may or may not exist. For example, theprofiles of opposite surfaces of any two adjacent lens elements maycorrespond to each other, and in such situation, the air gap may notexist. The air gap d1 is denoted by G12, the air gap d2 is denoted byG23, the air gap d3 is denoted by G34, the air gap d4 is denoted by G45.

FIG. 4 depicts the optical characters of each lens elements in theoptical imaging lens 1 of the present embodiment, wherein the values ofT1, T2, T3, T4, G12, G23, V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2,EFL/G12, EFL/T4, BFL/G12, BFL/T1, EFL/T1, BFL/T4, |V2-V3| and T4/G23are:

T1=0.46 (mm);

T2=0.61 (mm);

T3=0.22 (mm);

T4=0.69 (mm);

G12=0.22 (mm);

G23=0.17 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL 32 2.11 (mm);

BFL=1.15 (mm);

TTL=3.95 (mm);

T3/G12=1.00;

EFL/T2=3.47;

EFL/G12=9.62;

EFL/T4=3.05;

BFL/G12=5.23;

BFL/T1=2.51;

EFL/T1=4.62;

BFL/T4=1.66;

|V2-V3|=32.46;

T4/G23=3.96.

The distance from the object-side surface 111 of the first lens element110 to the image plane 170 along the optical axis is 3.95 mm, and thelength of the optical imaging lens 1 is shortened.

Please note that the HFOV of the optical imaging lens 1 reaches 46.98degrees and meanwhile the length thereof is shortened to only 3.95 mm.Thus, the optical imaging lens 1 is capable to provide excellent imagingquality for smaller sized mobile devices.

The aspherical surfaces, including the object-side surface 111 and theimage-side surface 112 of the first lens element 110, the object-sidesurface 121 and the image-side surface 122 of the second lens element120, the object-side surface 131 and the image-side surface 132 of thethird lens element 130, the object-side surface 141 and the image-sidesurface 142 of the fourth lens element 140, the object-side surface 151and the image-side surface 152 of the fifth lens element 150 are alldefined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{2i} \times Y^{2i}}}}$

wherein,

R represents the radius of curvature of the surface of the lens element;

Z represents the depth of the aspherical surface (the perpendiculardistance between the point of the aspherical surface at a distance Yfrom the optical axis and the tangent plane of the vertex on the opticalaxis of the aspherical surface);

Y represents the perpendicular distance between the point of theaspherical surface and the optical axis;

K represents a conic constant;

a_(2i) represents an aspherical coefficient of 2i^(th) level.

The values of each aspherical parameter are shown in FIG. 5.

As illustrated in FIG. 3, longitudinal spherical aberration (a), thecurves of different wavelengths are closed to each other. Thisrepresents off-axis light with respect to these wavelengths is focusedaround an image point. From the vertical deviation of each curve showntherein, the offset of the off-axis light relative to the image point iswithin ±0.04 mm. Therefore, the present embodiment improves thelongitudinal spherical aberration with respect to different wavelengths.

Please refer to FIG. 3, astigmatism aberration in the sagittal direction(b) and astigmatism aberration in the tangential direction (c). Thefocus variation with respect to the three wavelengths in the whole fieldfalls within ±0.10 mm. This reflects the optical imaging lens 1 of thepresent embodiment eliminates aberration effectively. Additionally, theclosed curves represents dispersion is improved.

Please refer to FIG. 3, distortion aberration (d), which showing thevariation of the distortion aberration is within ±2%. Such distortionaberration meets the requirement of acceptable image quality and showsthe optical imaging lens 1 of the present embodiment could restrict thedistortion aberration to raise the image quality even though the lengthof the optical imaging lens 1 is shortened to 3.95 mm.

Therefore, the optical imaging lens 1 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 1 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 1is effectively shortened.

Reference is now made to FIGS. 6-9. FIG. 6 illustrates an examplecross-sectional view of an optical imaging lens 2 having five lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 7 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 8 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 9 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 2, for example, reference number 231 for labeling theobject-side surface of the third lens element 230, reference number 232for labeling the image-side surface of the third lens element 230, etc.

As shown in FIG. 6, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 210, an aperture stop200, a second lens element 220, a third lens element 230, a fourth lenselement 240 and a fifth lens element 250.

The differences between the second embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 221, but the configuration of thepositive/negative refracting power of the first, second, third, fourthand fifth lens elements 210, 220, 230, 240, 250 and configuration of theconcave/convex shape of surfaces, comprising the object-side surfaces211, 231, 241, 251 facing to the object side A1 and the image-sidesurfaces 212, 222, 232, 242, 252 facing to the image side A2, aresimilar to those in the first embodiment. Specifically, the object-sidesurface 221 of the second lens element 220 comprises a convex portion2211 in a vicinity of the optical axis and a concave portion 2212 in avicinity of a periphery of the second lens element 220. Please refer toFIG. 8 for the optical characteristics of each lens elements in theoptical imaging lens 2 the present embodiment, the values of T1, T2, T3,T4, G12, G23, V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4,BFL/G12, BFL/T1, EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.44 (mm);

T2=0.32 (mm);

T3=0.22 (mm);

T4=0.77 (mm);

G12=0.40 (mm);

G23=0.24 (mm); V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.36 (mm);

BFL=0.92 (mm);

TTL=3.75 (mm);

T3/G12=0.56;

EFL/T2=7.26;

EFL/G12=5.97;

EFL/T4=3.07;

BFL/G12=2.33;

BFL/T1=2.10;

EFL/T1=5.39;

BFL/T4=1.20;

|V2-V3|=32.46;

T4/G23=3.25.

The distance from the object-side surface 211 of the first lens element210 to the image plane 270 along the optical axis is 3.75 mm and thelength of the optical imaging lens 2 is shortened.

Please note that the HFOV of the optical imaging lens 2 reaches 43.08degrees and meanwhile the length thereof is shortened to only 3.75 mm.Thus, the optical imaging lens 2 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 7, the optical imaging lens 2 of the present embodimentshows great characteristics in longitudinal spherical aberration (a),astigmatism in the sagittal direction (b), astigmatism in the tangentialdirection (c), and distortion aberration (d). Therefore, according tothe above illustration, the optical imaging lens of the presentembodiment indeed shows great optical performance and the length of theoptical imaging lens 2 is effectively shortened.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 3 having five lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 11 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment. The reference numbers labeledin the present embodiment are similar to those in the first embodimentfor the similar elements, but here the reference numbers are initialedwith 3, for example, reference number 331 for labeling the object-sidesurface of the third lens element 330, reference number 332 for labelingthe image-side surface of the third lens element 330, etc.

As shown in FIG. 10, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 310, an aperture stop300, a second lens element 320, a third lens element 330, a fourth lenselement 340 and a fifth lens element 350.

The differences between the third embodiment and the second embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the object-sidesurface 341, but the configuration of the positive/negative refractingpower of the first, second, third, fourth and fifth lens elements 310,320, 330, 340, 350 and configuration of the concave/convex shape ofsurfaces, comprising the object-side surfaces 311, 321, 331, 351 facingto the object side A1 and the image-side surfaces 312, 322, 332, 342,352 facing to the image side A2, are similar to those in the secondembodiment. Specifically, the object-side surface 341 of the fourth lenselement 340 comprises a concave portion 3411 in a vicinity of theoptical axis, a concave portion 3412 in a vicinity of a periphery of thefourth lens element 340 and a convex portion 3413 between the vicinityof the optical axis and the vicinity of the periphery of the fourth lenselement 340. Please refer to FIG. 12 for the optical characteristics ofeach lens elements in the optical imaging lens 3 of the presentembodiment, wherein the values of T1, T2, T3, T4, G12, G23, V2, V3, EFL,BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1, EFL/T1,BFL/T4, |V2-V3| and T4/G23 are:

T1=0.41 (mm);

T2=0.32 (mm);

T3=0.23 (mm);

T4=0.58 (mm);

G12=0.31 (mm);

G23=0.25 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.39 (mm);

BFL=0.94 (mm);

TTL=3.47 (mm);

T3/G12=0.76;

EFL/T2=7.39;

EFL/G12=7.78;

EFL/T4=4.11;

BFL/G12=3.05;

BFL/T1=2.31;

EFL/T1=5.88;

BFL/T4 =1.61;

|V2-V3|=32.46;

T4/G23=2.31.

The distance from the object-side surface 311 of the first lens element310 to the image plane 370 along the optical axis is 3.47 mm and thelength of the optical imaging lens 3 is shortened.

Please note that the HFOV of the optical imaging lens 3 reaches 43.00degrees and meanwhile the length thereof is shortened to only 3.47 mm.Thus, the optical imaging lens 3 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 11, the optical imaging lens 3 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 3 is effectively shortened.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 4 having five lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 15 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 16 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 17 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 4, forexample, reference number 431 for labeling the object-side surface ofthe third lens element 430, reference number 432 for labeling theimage-side surface of the third lens element 430, etc.

As shown in FIG. 14, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 410, an aperture stop400, a second lens element 420, a third lens element 430, a fourth lenselement 440 and a fifth lens element 450.

The differences between the fourth embodiment and the second embodimentare the radius of curvature and thickness of each lens element and thedistance of each air gap, but the configuration of the positive/negativerefracting power of the first, second, third, fourth and fifth lenselements 410, 420, 430, 440, 450 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 411, 421, 431,441, 451 facing to the object side A1 and the image-side surfaces 412,422, 432, 442, 452 facing to the image side A2, are similar to those inthe second embodiment. Please refer to FIG. 16 for the opticalcharacteristics of each lens elements in the optical imaging lens 4 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.30 (mm);

T2=0.60 (mm);

T3=0.51 (mm);

T4=0.91 (mm);

G12=0.14 (mm);

G23=0.19 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.11 (mm);

BFL=1.01 (mm);

TTL=3.97 (mm);

T3/G12=3.50;

EFL/T2=3.54;

EFL/G12=14.59;

EFL/T4=2.33;

BFL/G12=6.99;

BFL/T1=3.39;

EFL/T1=7.07;

BFL/T4=1.12;

|V2-V3|=32.46;

T4/G23=4.75.

The distance from the object-side surface 411 of the first lens element410 to the image plane 470 along the optical axis is 3.97 mm and thelength of the optical imaging lens 4 is shortened.

Please note that the HFOV of the optical imaging lens 4 reaches 46.97degrees and meanwhile the length thereof is shortened to only 3.97 mm.Thus, the optical imaging lens 4 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 15, the optical imaging lens 4 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 4 is effectively shortened.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 5 having five lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 19 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 20 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 5, forexample, reference number 531 for labeling the object-side surface ofthe third lens element 530, reference number 532 for labeling theimage-side surface of the third lens element 530, etc.

As shown in FIG. 18, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 510, an aperture stop500, a second lens element 520, a third lens element 530, a fourth lenselement 540 and a fifth lens element 550.

The differences between the fifth embodiment and the second embodimentare the radius of curvature and thickness of each lens element and thedistance of each air gap, but the configuration of the positive/negativerefracting power of the first, second, third, fourth and fifth lenselements 510, 520, 530, 540, 550 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 511, 521, 531,541, 551 facing to the object side A1 and the image-side surfaces 512,522, 532, 542, 552 facing to the image side A2, are similar to those inthe second embodiment. Please refer to FIG. 20 for the opticalcharacteristics of each lens elements in the optical imaging lens 5 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.35 (mm);

T2=0.65 (mm);

T3=0.45 (mm);

T4=0.91 (mm);

G12=0.13 (mm);

G23=0.21 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.21 (mm);

BFL=0.94 (mm);

TTL=3.97 (mm);

T3/G12=3.36;

EFL/T2=3.39;

EFL/G12=16.46;

EFL/T4=2.42;

BFL/G12=7.00;

BFL/T1=2.72;

EFL/T1=6.40;

BFL/T4=1.03;

|V2-V3|=32.46;

T4/G23=4.29.

The distance from the object-side surface 511 of the first lens element510 to the image plane 570 along the optical axis is 3.97 mm and thelength of the optical imaging lens 5 is shortened.

Please note that the HFOV of the optical imaging lens 5 reaches 46.36degrees and meanwhile the length thereof is shortened to only 3.97 mm.Thus, the optical imaging lens 5 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 19, the optical imaging lens 5 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 5 is effectively shortened.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 6 having five lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 23 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 6, forexample, reference number 631 for labeling the object-side surface ofthe third lens element 630, reference number 632 for labeling theimage-side surface of the third lens element 630, etc.

As shown in FIG. 22, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 610, an aperture stop600, a second lens element 620, a third lens element 630, a fourth lenselement 640 and a fifth lens element 650.

The differences between the sixth embodiment and the third embodimentare the radius of curvature and thickness of each lens element and thedistance of each air gap, but the configuration of the positive/negativerefracting power of the first, second, third, fourth and fifth lenselements 610, 620, 630, 640, 650 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 611, 621, 631,641, 651 facing to the object side A1 and the image-side surfaces 612,622, 632, 642, 652 facing to the image side A2, are similar to those inthe third embodiment. Please refer to FIG. 24 for the opticalcharacteristics of each lens elements in the optical imaging lens 6 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.38 (mm);

T2=0.54 (mm);

T3=0.22 (mm);

T4=0.55 (mm);

G12=0.30 (mm);

G23=0.20 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.27 (mm);

BFL=1.31 (mm);

TTL=3.99 (mm);

T3/G12=0.73;

EFL/T2=4.25;

EFL/G12=7.57;

EFL/T4=4.16;

BFL/G12=4.34;

BFL/T1=3.47;

EFL/T1=6.06;

BFL/T4=2.38;

|V2-V3|=32.46;

T4/G23=2.72.

The distance from the object-side surface 611 of the first lens element610 to the image plane 670 along the optical axis is 3.99 mm and thelength of the optical imaging lens 6 is shortened.

Please note that the HFOV of the optical imaging lens 6 reaches 44.89degrees and meanwhile the length thereof is shortened to only 3.99 mm.Thus, the optical imaging lens 6 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 23, the optical imaging lens 6 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 6 is effectively shortened.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 7 having five lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 27 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 28 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 7, forexample, reference number 731 for labeling the object-side surface ofthe third lens element 730, reference number 732 for labeling theimage-side surface of the third lens element 730, etc.

As shown in FIG. 26, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 710, an aperture stop700, a second lens element 720, a third lens element 730, a fourth lenselement 740 and a fifth lens element 750.

The differences between the seventh embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the image-side surface 712, but the configuration of thepositive/negative refracting power of the first, second, third, fourthand fifth lens elements 710, 720, 730, 740, 750 and configuration of theconcave/convex shape of surfaces, comprising the object-side surfaces711, 721, 731, 741, 751 facing to the object side A1 and the image-sidesurfaces 722, 732, 742, 752 facing to the image side A2, are similar tothose in the first embodiment. Specifically, the image-side surface 712of the first lens element 710 comprises a concave portion 7121 in avicinity of the optical axis and a convex portion 7122 in a vicinity ofa periphery of the first lens element 710. Please refer to FIG. 28 forthe optical characteristics of each lens elements in the optical imaginglens 7 of the present embodiment, wherein the values of T1, T2, T3, T4,G12, G23, V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4,BFL/G12, BFL/T1, EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.44 (mm);

T2=0.34 (mm);

T3=0.28 (mm);

T4=0.78 (mm);

G12=0.36 (mm);

G23=0.21 (mm);

V2=55.11 (mm);

V3=21.67 (mm);

EFL=2.21 (mm);

BFL=1.09 (mm);

TTL=3.88 (mm);

T3/G12=0.78;

EFL/T2=6.49;

EFL/G12=6.22;

EFL/T4=2.84;

BFL/G12=3.05;

BFL/T1=2.44;

EFL/T1=4.98;

BFL/T4=1.40;

|V2-V3|=34.45;

T4/G23=3.65.

The distance from the object-side surface 711 of the first lens element710 to the image plane 770 along the optical axis is 3.88 mm and thelength of the optical imaging lens 7 is shortened.

Please note that the HFOV of the optical imaging lens 7 reaches 45.50degrees and meanwhile the length thereof is shortened to only 3.88 mm.Thus, the optical imaging lens 7 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 27, the optical imaging lens 7 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 7 is effectively shortened.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 8 having five lenselements of the optical imaging lens according to an eighth exampleembodiment. FIG. 31 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 8, forexample, reference number 831 for labeling the object-side surface ofthe third lens element 830, reference number 832 for labeling theimage-side surface of the third lens element 830, etc.

As shown in FIG. 30, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 810, an aperture stop800, a second lens element 820, a third lens element 830, a fourth lenselement 840 and a fifth lens element 850.

The differences between the eighth embodiment and the first embodimentare the radius of curvature and thickness of each lens element and thedistance of each air gap, but the configuration of the positive/negativerefracting power of the first, second, third, fourth and fifth lenselements 810, 820, 830, 840, 850 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 811, 821, 831,841, 851 facing to the object side A1 and the image-side surfaces 812,822, 832, 842, 852 facing to the image side A2, are similar to those inthe first embodiment. Please refer to FIG. 32 for the opticalcharacteristics of each lens elements in the optical imaging lens 8 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.44 (mm);

T2=0.34 (mm);

T3=0.28 (mm);

T4=0.78 (mm);

G12=0.35 (mm);

G23=0.21 (mm);

V2=49.62 (mm);

V3=30.19 (mm);

EFL=2.21 (mm);

BFL=1.09 (mm);

TTL=3.87 (mm);

T3/G12=0.79;

EFL/T2=6.50;

EFL/G12=6.28;

EFL/T4=2.84;

BFL/G12=3.09;

BFL/T1=2.46;

EFL/T1=4.99;

BFL/T4=1.40;

|V2-V3|=19.43;

T4/G23=3.69.

The distance from the object-side surface 811 of the first lens element810 to the image plane 870 along the optical axis is 3.87 mm and thelength of the optical imaging lens 8 is shortened.

Please note that the HFOV of the optical imaging lens 8 reaches 45.50degrees and meanwhile the length thereof is shortened to only 3.87 mm.Thus, the optical imaging lens 8 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 31, the optical imaging lens 8 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 8 is effectively shortened.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 9 having five lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 35 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 36 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 9, forexample, reference number 931 for labeling the object-side surface ofthe third lens element 930, reference number 932 for labeling theimage-side surface of the third lens element 930, etc.

As shown in FIG. 34, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 910, an aperture stop900, a second lens element 920, a third lens element 930, a fourth lenselement 940 and a fifth lens element 950.

The differences between the ninth embodiment and the second embodimentare the radius of curvature and thickness of each lens element and thedistance of each air gap, but the configuration of the positive/negativerefracting power of the first, second, third, fourth and fifth lenselements 910, 920, 930, 940, 950 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 911, 921, 931,941, 951 facing to the object side A1 and the image-side surfaces 912,922, 932, 942, 952 facing to the image side A2, are similar to those inthe second embodiment. Please refer to FIG. 36 for the opticalcharacteristics of each lens elements in the optical imaging lens 9 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.42 (mm);

T2=0.57 (mm);

T3=0.21 (mm);

T4=0.77 (mm);

G12=0.17 (mm);

G23=0.22 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.15 (mm);

BFL=0.93 (mm);

TTL=3.73 (mm);

T3/G12=1.24;

EFL/T2=3.80;

EFL/G12=12.76;

EFL/T4=2.79;

BFL/G12=5.53;

BFL/T1=2.21;

EFL/T1=5.11;

BFL/T4=1.21;

|V2-V3|=32.46;

T4/G23=3.51.

The distance from the object-side surface 911 of the first lens element910 to the image plane 970 along the optical axis is 3.73 mm and thelength of the optical imaging lens 9 is shortened.

Please note that the HFOV of the optical imaging lens 9 reaches 45.90degrees and meanwhile the length thereof is shortened to only 3.73 mm.Thus, the optical imaging lens 9 is capable to provide excellent imagingquality for smaller sized mobile devices.

As shown in FIG. 35, the optical imaging lens 9 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 9 is effectively shortened.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 10 having five lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 39 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 40 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 10, forexample, reference number 1031 for labeling the object-side surface ofthe third lens element 1030, reference number 1032 for labeling theimage-side surface of the third lens element 1030, etc.

As shown in FIG. 38, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 1010, an aperture stop1000, a second lens element 1020, a third lens element 1030, a fourthlens element 1040 and a fifth lens element 1050.

The differences between the tenth embodiment and the second embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 1011 and the image-side surface 1012,but the configuration of the positive/negative refracting power of thefirst, second, third, fourth and fifth lens elements 1010, 1020, 1030,1040, 1050 and configuration of the concave/convex shape of surfaces,comprising the object-side surfaces 1021, 1031, 1041, 1051 facing to theobject side A1 and the image-side surfaces 1022, 1032, 1042, 1052 facingto the image side A2, are similar to those in the second embodiment, andthe object-side surface 1051 of the fifth lens element 1050 is a convexsurface comprising a convex portion 10511 in a vicinity of the opticalaxis and a convex portion 10512 in a vicinity of a periphery of thefifth lens element 1050. Specifically, the object-side surface 1011 ofthe first lens element 1010 comprises a convex portion 10111 in avicinity of the optical axis and a concave portion 10112 in a vicinityof a periphery of the first lens element 1010, and the image-sidesurface 1012 of the first lens element 1010 comprises a concave portion10121 in a vicinity of the optical axis and a convex portion 10122 in avicinity of a periphery of the first lens element 1010. Please refer toFIG. 36 for the optical characteristics of each lens elements in theoptical imaging lens 10 of the present embodiment, wherein the values ofT1, T2, T3, T4, G12, G23, V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2,EFL/G12, EFL/T4, BFL/G12, BFL/T1, EFL/T1, BFL/T4, |V2-V3| and T4/G23are:

T1=0.25 (mm);

T2=0.52 (mm);

T3=0.22 (mm);

T4=0.39 (mm);

G12=0.16 (mm);

G23=0.43 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.61 (mm);

BFL=1.11 (mm);

TTL=3.95 (mm);

T3/G12=1.39;

EFL/T2=4.99;

EFL/G12=16.49;

EFL/T4=6.68;

BFL/G12=6.99;

BFL/T1=4.37;

EFL/T1=10.31;

BFL/T4=2.83;

|V2-V3|=32.46;

T4/G23=0.91.

The distance from the object-side surface 1011 of the first lens element1010 to the image plane 1070 along the optical axis is 3.95 mm and thelength of the optical imaging lens 10 is shortened.

Please note that the HFOV of the optical imaging lens 10 reaches 40.79degrees and meanwhile the length thereof is shortened to only 3.95 mm.Thus, the optical imaging lens 10 is capable to provide excellentimaging quality for smaller sized mobile devices.

As shown in FIG. 39, the optical imaging lens 10 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 10 is effectively shortened.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 11 having five lenselements of the optical imaging lens according to a eleventh exampleembodiment. FIG. 43 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 11 according to the eleventh embodiment. FIG. 44 shows an exampletable of optical data of each lens element of the optical imaging lens11 according to the eleventh example embodiment. FIG. 45 shows anexample table of aspherical data of the optical imaging lens 11according to the eleventh example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 11, for example, reference number 1131 for labeling theobject-side surface of the third lens element 1130, reference number1132 for labeling the image-side surface of the third lens element 1130,etc.

As shown in FIG. 42, the optical imaging lens 11 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 1110, an aperture stop1100, a second lens element 1120, a third lens element 1130, a fourthlens element 1140 and a fifth lens element 1150.

The differences between the eleventh embodiment and the tenth embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 1151 and the image-side surface 1142,but the configuration of the positive/negative refracting power of thefirst, second, third, fourth and fifth lens elements 1110, 1120, 1130,1140, 1150 and configuration of the concave/convex shape of surfaces,comprising the object-side surfaces 1111, 1131, 1141 facing to theobject side A1 and the image-side surfaces 1112, 1122, 1132, 1152 facingto the image side A2, are similar to those in the tenth embodiment, andthe object-side surface 1121 of the second lens element 1120 is aconcave surface. Specifically, the image-side surface 1142 of the fourthlens element 1140 comprises a convex portion 11421 in a vicinity of theoptical axis, a convex portion 11422 in a vicinity of a periphery of thefourth lens element 1140 and a concave portion 11423 between thevicinity of the optical axis and the vicinity of the periphery of thefourth lens element 1140, and the object-side surface 1051 of the fifthlens element 1150 comprises a convex portion 11511 in a vicinity of theoptical axis and a concave portion 11512 in a vicinity of a periphery ofthe fifth lens element 1050. Please refer to FIG. 44 for the opticalcharacteristics of each lens elements in the optical imaging lens 11 ofthe present embodiment, wherein the values of T1, T2, T3, T4, G12, G23,V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12, BFL/T1,EFL/T1, BFL/T4, |V2-V3| and T4/G23 are:

T1=0.29 (mm);

T2=0.53 (mm);

T3=0.22 (mm);

T4=0.38 (mm);

G12=0.19 (mm);

G23=0.27 (mm);

V2=55.71 (mm);

V3=23.26 (mm);

EFL=2.29 (mm);

BFL=1.17 (mm);

TTL=3.70 (mm);

T3/G12=1.14;

EFL/T2=4.35;

EFL/G12=11.91;

EFL/T4=6.06;

BFL/G12=6.11;

BFL/T1=4.06;

EFL/T1=7.91;

BFL/T4=3.11;

|V2-V3|=32.46;

T4/G23=1.40.

The distance from the object-side surface 1111 of the first lens element1110 to the image plane 1170 along the optical axis is 3.70 mm and thelength of the optical imaging lens 11 is shortened.

Please note that the HFOV of the optical imaging lens 11 reaches 44.58degrees and meanwhile the length thereof is shortened to only 3.70 mm.Thus, the optical imaging lens 11 is capable to provide excellentimaging quality for smaller sized mobile devices.

As shown in FIG. 43, the optical imaging lens 11 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 11 is effectively shortened.

Please refer to FIG. 46, which shows the values of T1, T2, T3, T4, G12,G23, V2, V3, EFL, BFL, TTL, T3/G12, EFL/T2, EFL/G12, EFL/T4, BFL/G12,BFL/T1, EFL/T1, BFL/T4, |V2-V3| and T4/G23 of all eleven embodiments,and it is clear that the optical imaging lens of the present inventionsatisfy the Equations (1), (2), (3)/(3′), (4), (5)/(5′), (6), (7), (8),(9), and/or (10).

Reference is now made to FIG. 47, which illustrates an examplestructural view of a first embodiment of mobile device 20 applying anaforesaid optical imaging lens. The mobile device 20 comprises a housing21 and a photography module 22 positioned in the housing 21. Examples ofthe mobile device 20 may be, but are not limited to, a mobile phone, acamera, a tablet computer, a personal digital assistant (PDA), etc.

As shown in FIG. 47, the photography module 22 may comprise an aforesaidoptical imaging lens with five lens elements, which is a prime lens andfor example the optical imaging lens 1 of the first embodiment, a lensbarrel 23 for positioning the optical imaging lens 1, a module housingunit 24 for positioning the lens barrel 23, a substrate 172 forpositioning the module housing unit 24, and an image sensor 171 which ispositioned at an image side of the optical imaging lens 1. The imageplane 170 is formed on the image sensor 171.

In some other example embodiments, the structure of the filtering unit160 may be omitted. In some example embodiments, the housing 21, thelens barrel 23, and/or the module housing unit 24 may be integrated intoa single component or assembled by multiple components. In some exampleembodiments, the image sensor 171 used in the present embodiment isdirectly attached to a substrate 172 in the form of a chip on board(COB) package, and such package is different from traditional chip scalepackages (CSP) since COB package does not require a cover glass beforethe image sensor 171 in the optical imaging lens 1. Aforesaid exemplaryembodiments are not limited to this package type and could beselectively incorporated in other described embodiments.

The five lens elements 110, 120, 130, 140, 150 are positioned in thelens barrel 23 in the way of separated by an air gap between any twoadjacent lens elements.

The module housing unit 24 comprises a lens backseat 2401 forpositioning the lens barrel 23 and an image sensor base 2406 positionedbetween the lens backseat 2401 and the image sensor 171. The lens barrel23 and the lens backseat 2401 are positioned along a same axis I-I′, andthe lens backseat 2401 is close to the outside of the lens barrel 23.The image sensor base 2406 is exemplarily close to the lens backseat2401 here. The image sensor base 2406 could be optionally omitted insome other embodiments of the present invention.

Because the length of the optical imaging lens 1 is merely 3.95 mm, thesize of the mobile device 20 may be quite small. Therefore, theembodiments described herein meet the market demand for smaller sizedproduct designs.

Reference is now made to FIG. 48, which shows another structural view ofa second embodiment of mobile device 20′ applying the aforesaid opticalimaging lens 1. One difference between the mobile device 20′ and themobile device 20 may be the lens backseat 2401 comprising a first seatunit 2402, a second seat unit 2403, a coil 2404 and a magnetic unit2405. The first seat unit 2402 is close to the outside of the lensbarrel 23, and positioned along an axis I-I′, and the second seat unit2403 is around the outside of the first seat unit 2402 and positionedalong with the axis I-I′. The coil 2404 is positioned between the firstseat unit 2402 and the inside of the second seat unit 2403. The magneticunit 2405 is positioned between the outside of the coil 2404 and theinside of the second seat unit 2403.

The lens barrel 23 and the optical imaging lens 1 positioned therein aredriven by the first seat unit 2402 for moving along the axis I-I′. Therest structure of the mobile device 20′ is similar to the mobile device20.

Similarly, because the length of the optical imaging lens 1, 3.95 mm, isshortened, the mobile device 20′ may be designed with a smaller size andmeanwhile good optical performance is still provided. Therefore, thepresent embodiment meets the demand of small sized product design andthe request of the market.

According to above illustration, it is clear that the mobile device andthe optical imaging lens thereof in example embodiments, throughcontrolling the detail structure and/or reflection power of the lenselements, the length of the optical imaging lens is effectivelyshortened and meanwhile good optical characters are still provided.

While various embodiments in accordance with the disclosed principlesbeen described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof exemplary embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, sequentially from anobject side to an image side along an optical axis, comprising first,second, third, fourth and fifth lens elements, each of said first,second, third, fourth and fifth lens elements having refracting power,an object-side surface facing toward the object side and an image-sidesurface facing toward the image side, wherein: said second lens elementhas positive refracting power, and said image-side surface thereofcomprises a convex portion in a vicinity of a periphery of the secondlens element; said image-side surface of said third lens elementcomprises a convex portion in a vicinity of the optical axis; saidobject-side surface of said fourth lens element comprises a concaveportion in a vicinity of a periphery of the fourth lens element, andsaid image-side surface of said fourth lens element is a convex surface;and said fifth lens element is constructed by plastic material, and theoptical imaging lens as a whole comprises only the five lens elementshaving refracting power.
 2. The optical imaging lens according to claim1, wherein a central thickness of the third lens element along theoptical axis is T3, an air gap between the first lens element and thesecond lens element along the optical axis is G12, and T3 and G12satisfy the equation:T3/G12≦3.5.
 3. The optical imaging lens according to claim 2, wherein acentral thickness of the second lens element along the optical axis isT2, an effective focal length of the optical imaging lens is EFL, and T2and EFL satisfy the equation:EFL/T2≦7.5.
 4. The optical imaging lens according to claim 3, wherein acentral thickness of the first lens element along the optical axis isT1, a back focal length of the optical imaging lens, i.e. the distancefrom the image-side surface of the fifth lens element to an image planeon the optical axis, is BFL, and T1 and BFL satisfy the equation:BFL/T1≦3.7.
 5. The optical imaging lens according to claim 4, whereinG12 and EFL satisfy the equation:EFL/G12≦13.
 6. The optical imaging lens according to claim 1, wherein acentral thickness of the second lens element along the optical axis isT2, an effective focal length of the optical imaging lens is EFL, and T2and EFL satisfy the equation:EFL/T2≦7.5.
 7. The optical imaging lens according to claim 6, wherein acentral thickness of the first lens element along the optical axis isT1, and T1 and EFL satisfy the equation:EFL/T1≦7.5.
 8. The optical imaging lens according to claim 7, wherein anair gap between the first lens element and the second lens element alongthe optical axis is G12, a back focal length of the optical imaginglens, i.e. the distance from the image-side surface of the fifth lenselement to an image plane on the optical axis, is BFL, and G12 and BFLsatisfy the equation:BFL/G12≦5.5.
 9. The optical imaging lens according to claim 1, whereinan air gap between the first lens element and the second lens elementalong the optical axis is G12, an effective focal length of the opticalimaging lens is EFL, and G12 and EFL satisfy the equation:EFL/G12≦16.5.
 10. The optical imaging lens according to claim 9, whereina central thickness of the fourth lens element along the optical axis isT4, a back focal length of the optical imaging lens, i.e. the distancefrom the image-side surface of the fifth lens element to an image planeon the optical axis, is BFL, and T4 and BFL satisfy the equation:BFL/T4≦3.2.
 11. The optical imaging lens according to claim 10, whereinthe abbe number of the second lens element is V2, and the abbe number ofthe third lens element is V3, and V2 and V3 satisfy the equation:15≦|V2-V3|≦40.
 12. The optical imaging lens according to claim 1,wherein a central thickness of the fourth lens element along the opticalaxis is T4, an effective focal length of the optical imaging lens isEFL, and T4 and EFL satisfy the equation:EFL/T4≦7.
 13. The optical imaging lens according to claim 12, wherein anair gap between the second lens element and the third lens element alongthe optical axis is G23, and T4 and G23 satisfy the equation:1.7≦T4/G23.
 14. The optical imaging lens according to claim 13, whereinsaid fourth lens element has positive refracting power and saidobject-side surface of said fifth lens element further comprises aconcave portion in a vicinity of a periphery of the fifth lens element.15. The optical imaging lens according to claim 1, wherein an air gapbetween the first lens element and the second lens element along theoptical axis is G12, a back focal length of the optical imaging lens,i.e. the distance from the image-side surface of the fifth lens elementto an image plane on the optical axis, is BFL, and G12 and BFL satisfythe equation:BFL/G12≦7.
 16. The optical imaging lens according to claim 15, whereinsaid object-side surface of said fourth lens element further comprises aconvex portion in a vicinity of the optical axis.
 17. The opticalimaging lens according to claim 16, wherein said fourth lens element haspositive refracting power and said image-side surface of said fifth lenselement further comprises a convex portion in a vicinity of a peripheryof the fifth lens element.
 18. A mobile device, comprising: a housing;and a photography module positioned in the housing and comprising: anoptical imaging lens sequentially from an object side to an image sidealong an optical axis, comprising first, second, third, fourth and fifthlens elements, each of said first, second, third, fourth and fifth lenselements having refracting power, an object-side surface facing towardthe object side and an image-side surface facing toward the image side,wherein: said second lens element has positive refracting power, andsaid image-side surface thereof comprises a convex portion in a vicinityof a periphery of the second lens element; said image-side surface ofsaid third lens element comprises a convex portion in a vicinity of theoptical axis; said object-side surface of said fourth lens elementcomprises a concave portion in a vicinity of a periphery of the fourthlens element, and said image-side surface of said fourth lens element isa convex surface; and said fifth lens element is constructed by plasticmaterial, and the optical imaging lens as a whole comprises only thefive lens elements having refracting power; a lens barrel forpositioning the optical imaging lens; a module housing unit forpositioning the lens barrel; and an image sensor positioned at the imageside of the optical imaging lens.